该程序实现了道路中桩放样，考虑了断链和前后缓和曲线不同的情况，统一由链表管理，实现了中桩的插入、删除、查询等功能。该程序已经用到实际工作中，效果较好。-The way the program implementation of pile setting out, consider the chain before and after the transition curve and the different situations, unified chain management, the i